Graphophone stop



F, L. CASPER.

GRAPHOPHONE STOP. APPLICATION FILEDA IuY s. 192|.

Patented Nov. 7, 1922.

Hifi/wf A5/AFL INVENTOR.

Patented Nov. '7, 1922.

NETE@ STATES 'FRANK n. CASPER, or Howns CAVE, new Youn.

GRAPHOPHONE STOP.

Application led vJuly 8, 1921. Serial No. 483,251.

T0 all whom t may concern.'

Be it known that l, FRANK L. CASPER, a citizen of the United States, residing at l-l'owes Cave, in the county of Schoharie and State of New York, have inventedcertain new and useful lmprovements in a Graphophone Stop, of which the following is a specification.

This invention relates to sound producing machines in which record disks are used having spiral grooves, and a tone arm carrying the stylus which traverses the record grooves, swings over a record supporting table transversely to the record grooves,

The main object of the invention is to improve upon the structure shown in my pending application for an automatic stop for graphophones, Serial Number 459,565, filed April 8, 1921.

A further object of the invention is to generally improve upon automatic stops of this character by providing a device which will be of extremely simple, durable and inexpensive construction, one which is eflicient and reliable in operation, and well adapted to the purpose for which it is designed.

With these and numerous other objects in view, the invention resides in certain novel features of construction, and the combination and arrangement of partsr as will be hereinafter fully described and claimed.

In the drawing :-V

Figure 1 is a plan view of a stop mecha-V nism embodying theinvention as applied to a graphophone, parts of which are shown,

Figure 2 is an enlarged sectional view taken through the central portion of Figure 1, and

Figure 3 is a perspective View of the shuttle used in conjunction with this ystop mechanism.

Referring to the drawing in detail it will be seen that 1 designates a part of the tone arm, 2 the turn table or rotary record support of a graphophone or typical sound producing machine, and 3 the turn table spindle.

The stop mechanism is shown as mountec on a base plate 4 which is suitably fastened to the top board or plate or other part of the graphophone in any preferred manner.

An angular brake lever 6 is pivotally mounted on the other corner of the plate 4 and is provided with a shoe or pad 7 at one end, of rubber or other suitable elastic material which isso positioned as to cooperate with theusual depending flange of the turn table 2 in order to stop same through its frictional engagement therewith. The spring Y 9 is attached to one arm of the angular brake lever 6 and its other end is suitably attached to the top board of the graphophone or anyv other suitable part thereof and normally tends to move the brake lever so that the pad 7 thereof will be iny engagement with the turn table. A detent 10 is formed at the end of the other arm of the brake lever 6 and is adapted to engage in the notch 11 rovided in the lever 12. This lever 12 is pivoted at 13 to the plate 4 and has for its purpose to hold the angle of the brake lever 6 in an inoperative position as shown in Figure 1. Tt is to be understood that if the lever 12 is moved slightly to the right, as shown in Figure 1, or in a clockwise direction that it will allow the detent 10 to be disengaged from the notch 11 thereof and thus the spring 9 will force the angularbrake lever 6 in an operative or set position that is so that the shoe or pad 7 engages the turn table and has a breaking action thereon. A bracket 14 is suitably fixed to the tone arm 1 and rotates therewith. A pin 15 .is provided at the end of the bracket 14 and is situated in an elongated slot 16 provided in the rod 17. This rod 17 is pivoted at 18 to the pivoted bar 19. This pivoted bar 19 is pivoted at 20 to the graphophone and has its other end slotted as is shown at 21. i

A shuttle 22 includes a base plate having the ears 23 extending upwardly therefrom and one of these ears is provided with a T'- shaped member 24 thus forming the notches 25 with its ear 23. These notches 25 will receive the ends of the ivoted bar 19 and the slot thereof will receive the shank of the T-shaped member 24. The` shuttle 22r is adapted to slide along the lever 12 and the ears 23 thereof project upwardly so as to engage the sides of this lever 12. The shuttle is also provided with an arm 26 extend ing therefrom having its terminal curved upwardly so as to form a slotted ear 27.

l The slot 28 in this ear 27 is slanted and a needle 29 passes therethrough and is piv* otally mounted on the arm 26 at 30.

A pair of spaced guides 31 and 32 are mounted on the plate 4 adjacent one side edge thereof and slidably receive a rack bar 33. An extension 34 provided with a shoe 35 is situated at the inner end of the rack bar 33 and this shoel 35, is alwaysA in engagement with the cam 3 6 mounted on the spindle CII . stylus thereof will be situated beyondthe outer periphery of the turn table 2 the pin 15 is situated at oneend of the slot 16 in the rod 17 and the pivoted bar 19 will consequently be moved in a counter-clockwise direction thus moving the shuttle 22 `adjacent the pivot point of the lever 12 or so ,that the needle 2O thereof will be out oit engagement with the teeth on the rack 33 it being noted that the end of this rack adjacent the guide 32 is not .provided with rack teeth. The stylus lmay now be placed so as to engage the peripheral groove of the record. ln the present illustration and as is usual the turn table 2 rotates in a clockwise direction as will valso the tone arm. As this tone arm moves toward the center of the turn table transversely of the grooves in the record to a position a slight distance from they usual open space'found in the center of disk records now commonly in use, the pin 15 will engage the end of the slot 16 in the rod 17 and thus this continued movement oi' the tonev arm will force the pivoted bar 19 through the intermediacy oi" the rod 17 in a clockwise direction and cause the shuttle 22v to move along the lever 12 so as to place the needle 29 thereof in engagement with the teeth Iof the rack bar 33 which is at the same time reciprocated as previously described The motion imparted to the shuttle 22, however,` through the intermediacy ot the pivoted bar 19, rod by the tone arm 1 will be faster than that which would be imparted by the reciprocatory motion of the rack bar jengaging'the f needle 29 so that this movementolthe rack bar 33 at this time will have no eifect'upon the stop mechanism. Vhen the stylus has reached the last or inner groove of the record this motion of the shuttle 22 will' have ceased -l as' will be readily understood andv at this time the reciprocatory motion-fof the rack` bar 33 will come into place. The teeth of the rack bar`33 will engage theneedle 29 and tend to push it to the lower end of the slot 28 inthe lip 27 which, becauseI oi the f '.torelease the detent 10 ofi iact that the needle 29 ispivoted` at 30, will tend to push-the shuttle 22 away from the rack .bar 33 and thus slightly 'move thele'ver 12in a clockwise direction 4sufficiently the brake lever 6 fromlengagement with thenotch 11 and of coursefthe' spring 9 will now placev the'brake 17, and bracket 141,'

1 ,seance the lever` 12 the needle V29 will engage the teeth of the rack bail'3'3 but owing to the fact that the needle 29 is pivoted and passed throughy the inclined slot 2S this needle will be forced up the incline and thus out of engagement with the teeth of the rack bar 33 and may thus be moved easily and without any unnecessary friction toward the end ot the lever 12 the desired distance.l When the brake mechanism is to be released'allthat is necessary is to push the lever 12 in a counterclockwise direction and thus the detent 10 will again engage the notch 11 and the lever 12 will be held in this in Figure 1.

.Obviously, the invention is notlimited and restricted to the precise, and exact details of construction as illustrated, and deposition as shown scribed, because it is susceptible of a variety c of embodiments, and many minor mechanical changes may be made in suchpreferred incorporation of they invention without departing from thesubstance or essence of the invention without the sacrice of any of its substantial benefits and advantages. y

Having thus described my inventiony what I claim as, new is 1. In combination', a graphophone, a

brake mechanism therefor, a spindle on thegraphophone, a cam actuated by the spindle,l

a sliding rack bar, guides for the,V rack bar, said rack bar adapted to engage the cam', a spring for holding the rack bar in engagement with the cam, a lever for normally holding thebrake mechanism in an inoperative position, and a ysh-uttle mechanism mounted on the lever and engageable withv the rack bar so as to move the lever:` whereby the brake mechanism will be released..`

2. In combination,l a. graphophone, a brake mechanism therefor, a spindle 'on the graphophone, a cam actuated by the spindle,

a rack bar slidably mounted on the graphe-y phone and engaging the cam, means for holding the rack bar in engagement with the cam, a lever mounted on the graphephone and adapted to hold the brake mechanism ini an inoperative position, a shuttle mechanism mounted on the lever and en-J eating rack bar mounted on the phonograph,

needle beingengageable with therack its.

bei', and means Jfor moving the shuttle so that the needle thereof will engage the mok' ceiving the pin of the bracket, a pivoted bur mounted on the gra-phophone and pivotally connected to the rod intermediate its ends, l

said bar provided with a slot at its end, a brake mechanism, a lever mounted on the graphophone for holding the brake mechanism in an inoperative position, a shuttle slidably mounted on the lever and including a needle pivotally mounted and a. member engageable with the slot-ted end of the pivoted bar, e reciprocating rack bar engageable by the needle, and means for reciprocating the rack bar.

ln testimony whereof I niiX my signature in presence of two Witnesses.

FRANK L. CASPER. Witnesses:

FULLERTON, CHAS. W. WIELAND. 

